Quantitative comparison of selectivities in the polymerization of cyclic esters
Abstract
Chain transfer processes (ktr) taking place in the polymerization (anionic and pseudoanionic) of cyclic esters (lactones) are reviewed. These reactions are mostly responsible for the departure of these systems from the fully controlled (living) polymerizations. The ratios of kp/ktr have been determined for a number of initiating systems and the structures of the growing species are related to their selectivity, expressed by kp/ktr. It has been shown that the less reactive and more sterically crowded active species polymerize more selectively.
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Propagation is 100 times faster than bimolecular transesterification in the ring-opening polymerization of LLA in THF at 80 °C, and molecular weight is very well controlled.
“For instance, propagation is 100 times faster than bimolecular transesterification in the ring-opening polymerization of LLA in THF at 80 °C [8] and molecular weight is very well controlled.”
From Recent advances in the synthesis of aliphatic polyesters by ring-opening polymerization☆ (2008) · cites this paper as [8]
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References 20 · Cited by 73
- Authors
- Baran, J., Duda, A., Kowalski, A., Szymanski, R., & Penczek, S.
- Affiliations
- Centrum Badań Molekularnych i Makromolekularnych Polskiej Akademii Nauk (PL)
- Corresponding author
- Duda, Andrzej
- Venue
- Macromolecular Symposia
- Publisher
- Wiley
- Published
- 1997-09
- Volume
- 123
- Issue
- 1
- Pages
- 93-101
- ISSN
- 1022-1360 (ISSN-L)
- 1521-3900
- OpenAlex
- W2112515190
- Cited by
- 73
- References
- 20
- Citations by year
- 2026: 1 · 2024: 1 · 2022: 1 · 2021: 2 · 2020: 1 · 2019: 1 · 2017: 2 · 2016: 6 · 2015: 1 · 2013: 1 · 2012: 8
- FWCI
- 2.25
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Macromolecular Symposia (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Chemistry › Organic Chemistry › Advanced Polymer Synthesis and Characterization
- Physical Sciences › Chemistry › Organic Chemistry › Organometallic Complex Synthesis and Catalysis
- Keywords
- cyclic esters, lactones, anionic polymerization, chain transfer, living polymerization, initiation rate constant, polymerization selectivity, stereoelectronic effects
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